Malicious PDF — malware analysis report

Static analysis result for SHA-256 09214e1d7f02b7e0…

MALICIOUS

PDF

92.1 KB Created: 2021-07-03 02:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 048cd7d968f399478dfc3bdb7e620c9b SHA-1: 4421bdb230e81abdc430c55770e1c7b24466ff6c SHA-256: 09214e1d7f02b7e0d3a6b5f24c9b0ea495c0bef25cd8180130b0d1ae1e267cd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting, which is a common tactic for phishing or malware distribution. The presence of external URIs and link farm heuristics strongly suggests the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://archism.ru/uplcv?utm_term=silence+of+the+lambs+clarice+starling PDF link annotation
    • http://areaengineeringsrl.eu/userfiles/files/donasodobukirizad.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/xosorufanalagi.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/butari.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a31ed8665---4207682756.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/ruxujolabizas.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb121ade5a---48295266664.pdfIn PDF document text
    • http://fst-uinsu.net/userfiles/files/81167766310.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d6bbe63619c---fevopatozigajep.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091064c2cc36---54874173473.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/27157200749.pdfIn PDF document text
    • https://peterdegendt.be/file/54272999943.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/089a78d0a0d242ce1bd681a518dd1703/migebibamafube.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a00bd7e44d0---57467495788.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/336db3459fb3e07a1f293e8806d70d00/domoma.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/20799420668.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/99229342763.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/88578619175.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a9c418e98---jonuxevelebuzazoz.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/punewepitajeposab.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/bsjvn8kap47017v2pmb3r6bupa/rajebitowesapur.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/44s09i8jiguv03k8or2cctef58/12192177347.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab99df4a87a---sonudemepavolanawefuw.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/46182216430.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/fevufak.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d5c17978---43560686405.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA5 17328 bytes
SHA-256: 6a6fb3e1b8e9845517e5b4ad4292ce5da3da226b3955c63e572a3f1b4a893222
font_02_sfnt_off000147de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147DE 11000 bytes
SHA-256: 7787283e3e7368dab79206a9592b4193f50f800b5616ae210f68ed1a5357a673

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